IT942819B - Sistema videofonico - Google Patents

Sistema videofonico

Info

Publication number
IT942819B
IT942819B IT7068271A IT7068271A IT942819B IT 942819 B IT942819 B IT 942819B IT 7068271 A IT7068271 A IT 7068271A IT 7068271 A IT7068271 A IT 7068271A IT 942819 B IT942819 B IT 942819B
Authority
IT
Italy
Prior art keywords
phone system
video phone
video
phone
Prior art date
Application number
IT7068271A
Other languages
English (en)
Italian (it)
Original Assignee
Philips Nv
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Nv filed Critical Philips Nv
Application granted granted Critical
Publication of IT942819B publication Critical patent/IT942819B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working
    • H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
    • H04N7/147—Communication arrangements, e.g. identifying the communication as a video-communication, intermediate storage of the signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/084—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the horizontal blanking interval only
    • H04N7/085—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the horizontal blanking interval only the inserted signal being digital
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
    • H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/24—Systems for the transmission of television signals using pulse code modulation
    • H04N7/52—Systems for transmission of a pulse code modulated video signal with one or more other pulse code modulated signals, e.g. an audio signal or a synchronizing signal
    • H04N7/54—Systems for transmission of a pulse code modulated video signal with one or more other pulse code modulated signals, e.g. an audio signal or a synchronizing signal the signals being synchronous
    • H04N7/56—Synchronising systems therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Synchronizing For Television (AREA)
IT7068271A 1970-11-13 1971-11-10 Sistema videofonico IT942819B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7016628A NL7016628A (US20030199744A1-20031023-C00003.png) 1970-11-13 1970-11-13

Publications (1)

Publication Number Publication Date
IT942819B true IT942819B (it) 1973-04-02

Family

ID=19811548

Family Applications (1)

Application Number Title Priority Date Filing Date
IT7068271A IT942819B (it) 1970-11-13 1971-11-10 Sistema videofonico

Country Status (11)

Country Link
JP (1) JPS5227974B1 (US20030199744A1-20031023-C00003.png)
AU (1) AU3551771A (US20030199744A1-20031023-C00003.png)
CA (1) CA940244A (US20030199744A1-20031023-C00003.png)
CH (1) CH542560A (US20030199744A1-20031023-C00003.png)
DE (1) DE2152877C3 (US20030199744A1-20031023-C00003.png)
ES (1) ES396900A1 (US20030199744A1-20031023-C00003.png)
FR (1) FR2113933B1 (US20030199744A1-20031023-C00003.png)
GB (1) GB1321749A (US20030199744A1-20031023-C00003.png)
IT (1) IT942819B (US20030199744A1-20031023-C00003.png)
NL (1) NL7016628A (US20030199744A1-20031023-C00003.png)
SE (1) SE365691B (US20030199744A1-20031023-C00003.png)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2389290A1 (fr) * 1977-04-29 1978-11-24 Briand Marcel Dispositif d'emission et de reception par lignes analogiques de signaux visiophoniques et de signaux numeriques
FR2438401A1 (fr) * 1978-10-05 1980-04-30 Thomson Csf Procede de transmission d'un signal analogique audiofrequence pendant les intervalles de synchronisation de ligne-trame d'un signal de television et dispositif de mise en oeuvre de ce procede
FR2440669A1 (fr) * 1978-10-31 1980-05-30 Thomson Brandt Systeme de diffusion de signaux audio-visuels de television synchronises par une frequence pilote et procede de mise en oeuvre
IL58735A (en) * 1978-12-04 1982-01-31 Oak Industries Inc Subscription television coding system
EP0033306B1 (fr) * 1980-01-22 1985-08-28 Paul Pierre Delogne Procédé et installation de transmission de signaux de télévision par l'intermédiaire d'un codage numérique de ces signaux
FR2524241A1 (fr) * 1982-03-24 1983-09-30 Radiotechnique Circuit de commande du dispositif de decryptage d'un systeme de transmission d'emissions de television cryptees et systeme de transmission d'emissions cryptees comportant un tel circuit
FR2524242B1 (fr) * 1982-03-24 1986-02-07 Radiotechnique Circuit de reconnaissance de cryptage pour systeme de transmission d'emissions de television et systeme de transmission d'emissions cryptees comprenant un tel circuit
US4675722A (en) * 1982-12-02 1987-06-23 Independent Broadcasting Authority Apparatus for deriving synchronization signals for component television video signal reception
FR2552282B1 (fr) * 1983-09-21 1990-07-13 Veillard Jacques Procede et dispositif de demodulation coherente de porteuse a modulation numerique

Also Published As

Publication number Publication date
GB1321749A (en) 1973-06-27
FR2113933B1 (US20030199744A1-20031023-C00003.png) 1977-03-18
ES396900A1 (es) 1975-05-01
DE2152877C3 (de) 1978-09-14
CH542560A (de) 1973-09-30
FR2113933A1 (US20030199744A1-20031023-C00003.png) 1972-06-30
CA940244A (en) 1974-01-15
AU465455B2 (US20030199744A1-20031023-C00003.png) 1975-09-25
NL7016628A (US20030199744A1-20031023-C00003.png) 1972-05-16
JPS5227974B1 (US20030199744A1-20031023-C00003.png) 1977-07-23
SE365691B (US20030199744A1-20031023-C00003.png) 1974-03-25
DE2152877B2 (de) 1978-01-19
DE2152877A1 (de) 1972-05-31
AU3551771A (en) 1973-05-17

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